Distribution of sky erythema ultraviolet radiance for low latitude & architectural sun protection factor for sunshade

Abstract

Ultraviolet radiation may be cause the skin damage. In order to determine the shade to protect of the skin against ultraviolet radiation, it is necessary to know the radiance distribution of the sky ultraviolet radiation Conventionally, the sensor of the sky radiance distribution has been generally swept using mechanical method. The mechanical sweeping method has the problems that sky conditions change during several minutes. Electronically sweep-type measurement equipment for sky erythema ultraviolet radiation equipped with 145 area of erythema ultraviolet sensors was developed, and it has beccme possible to measure the all sky in only three seconds. This research aims to measure the erythema ultraviolet radiance distribution for low latitude area using this measurement equipment. A regression equation of radiance distribution was made from measurement results. Architectural Sun Protection Factor of shade was calculated using the equation.